Improvement in rulers



INVENTIIB:

ATTORNEYS.

m WW /2% C. M. HAYS.

RULERS;

Patented Dec. 5, 1876 THE GRAPHIC DO. MY

UNITE STATES PATENT OFFICE.

CHARLES M. HAYS, OF SILVER CITY, IDAHO TERRITORY.

IMPROVEMENT m RULERS.

Specification forming part of Letters Patent No. 185,102, dated December 5, 1876; application filed April 29, 1876.

To all whom it may concern Be it known thatI, CHARLES M. HAYS, of Silver City, in the county of Owyhee and Territory of Idaho, have invented a new and Im- 4 proved Ruler; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawing, forming part of this specification, in which Figure 1 is a view in perspective. Fig. 2 is a transverse section in line 00 av, Fig. 1.

The invention relates to parallel rulers, and consists in making a slot longitudinally in the wood, metal, gu'tta-percha, or other material of which it may be formed, in order to enable one using it to see, without stooning, rising,

or changing his position (at a table or desk) the figures under which a balancing-lineis to be drawn, the same being thus readily done without danger of blotting. I

A represents the rule, which may be notated with a scale of inches on the front of the lower plate a and on the ends-of the ruler. There may be also attached, in any preferred man- 'ner, a suitable paper-cutter.

The operation is as follows: The ruler is placed on a ledger and moved up'and down,

the book-keeper looking through the slotuntil E. H. MOORE, .J. H. WICKENHAM. 

